1. Bispebjerg Hospital Digestive Disease Center Bispebjerg Bakke 23 DK-2400 Copenhagen Denmark
2. Digestive Disease Center, Surgical Section, Bispebjerg Hospital, Copenhagen, Denmark
3. Department of Diagnostic Radiology, Rigshospitalet, Copenhagen, Denmark
4. Department of Surgery, Regionshospitalet Horsens, Horsens, DenmarkInstitute for Clinical Medicine, Faculty of Health, University of Aarhus, Aarhus, Denmark
5. Department of Surgery, Zealand University Hospital, Køge, Denmark
6. Digestive Disease Center, Surgical Section, Bispebjerg Hospital, Copenhagen, DenmarkInstitute for Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
7. Department of Gastrointestinal Surgery, Aalborg University Hospital, Aalborg, DenmarkDepartment of Clinical Medicine, The Faculty of Medicine, Aalborg University, Aalborg, Denmark
8. Department of Surgery, Odense University Hospital, Odense, Denmark
9. Department of Gastroenterology and Gastrointestinal Surgery, Hvidovre Hospital, Copenhagen, Denmark
10. Department of Surgery, Aarhus University Hospital, Aarhus, Denmark
11. Institute for Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, DenmarkDepartment of Surgery, Herlev Gentofte Hospital, Herlev, Denmark
12. Department of Gastrointestinal Surgery, Aalborg University Hospital, Aalborg, Denmark